Resize Image Dimensions in Pixels — Free Online Image Resizer

How to use it

Step 1

Choose an image

Click the upload area and select an image from your device.

Step 2

Enter the size

Type the width and height, or press a preset. Turn off "Keep aspect ratio" if you need an exact shape.

Step 3

Pick a mode and format

Choose Stretch, Crop or Pad, then JPG, PNG or WebP.

Step 4

Set the file size if needed

Use the quality slider, or enter a target in KB and check the size shown under the preview.

Step 5

Download

When the preview looks right, click "Download Resized Image".

What this tool does

It takes one image from your device and redraws it at the width and height you enter. You can then save the result as JPG, PNG or WebP. Next to the controls you see the original size and the new size in pixels and KB, so you know what changed before you download.

Why change image dimensions in pixels

A photo from a phone is often several thousand pixels wide and several MB in size. A government form may accept only 300 x 300 pixels, a signature box may want 140 x 60 pixels, and a blog may need a smaller image to load faster. Resizing by hand in an editor means guessing, saving and checking again. Here the size and preview update as you type.

Width, height and aspect ratio

When you load an image, the fields are filled with its original width and height. With "Keep aspect ratio" on, changing one value updates the other so the picture does not look stretched. Turn it off when a form needs an exact shape, for example 140 x 60. The tool does not stop you from entering values larger than the original, but enlarging a small image makes it look soft.

Quick presets

Four preset buttons fill in common sizes: 140 x 60 for signature-style boxes, 1200 x 630 for a Facebook post, 1080 x 1080 for an Instagram square, and 1280 x 720 for a YouTube thumbnail. A preset turns the aspect ratio lock off, so the exact numbers are used. You can still edit them afterwards.

Resize mode: stretch, crop or pad

This matters when the new shape is different from the original. "Stretch / Fit Exact" forces the image into your width and height, which can distort it. "Crop to Fill" scales the image until it covers the whole area and trims the overflow from the centre. "Pad / Letterbox" keeps the whole image visible and fills the empty space with a solid background, which is white in the current version.

Resize image size in pixels and KB together

Type a number in "Target file size (KB)" and the tool adjusts the compression quality to get close to it. It tries up to six quality values and stops when the result is within about 10 KB of your target. This means the result is approximate, not exact, so always read the "Size" shown under the preview. If the file is still too large, lower the width and height or choose WebP. When a target is entered, the quality slider is disabled; clear the box to use the slider again.

Quality and output format

The quality slider runs from 10 to 100 and starts at 85. A lower value gives a smaller file with more visible compression. JPG and WebP respond to this setting. PNG is lossless, so quality does not change it, and the target KB feature is not applied to PNG. To reduce image dimensions in pixels and also keep the file small, JPG or WebP is usually the better choice for photos.

Live preview and download

The preview updates a moment after you change a value. It shows the resized image, not a side-by-side comparison, while the original size is shown above the controls. The download button saves the file as resized-image.jpg, resized-image.png or resized-image.webp depending on the format you picked. "Change Image" lets you start with a different picture.

What can you use it for?

Application and exam forms

Match a required pixel size and a KB limit, such as a photo or ID image for a portal.

Digital signature boxes

Use the 140 x 60 preset or type your own size for a scanned signature.

Social media images

Start from the Facebook, Instagram or YouTube preset instead of looking up sizes.

Website and email images

Reduce pixels and file size so a page or an attachment stays light.

Tool information

Tool type	Image resizer
Input	One image chosen with the file picker (accepts image/*)
Output formats	JPG, PNG, WebP
Resize modes	Stretch / Fit Exact, Crop to Fill, Pad / Letterbox
Quality range	10–100 (default 85); not used for PNG
Target file size	Optional, in KB; approximate; not applied to PNG
Presets	140 x 60, 1200 x 630, 1080 x 1080, 1280 x 720
Multiple files	No, one image at a time
Maximum file size	No limit set by the tool; your browser and device memory decide
Processing	In your browser using canvas; no upload by this tool
Download name	resized-image.jpg / .png / .webp

Benefits

Set pixels and approximate KB size on the same screen.
Presets for common sizes, including 140 x 60.
Three resize modes for different shapes.
Preview and size readout before you download.

Limitations

One image at a time; there is no batch mode in this tool.
Target KB is approximate and works only for JPG and WebP.
The background is filled with white, so transparent areas in a PNG become white.
Very large images can be slow or fail because the work happens in your browser.
Enlarging an image above its original size cannot add detail.
If processing fails, the preview simply stops updating and no error message is shown.

Privacy

The image is read and redrawn in your browser using canvas. This tool does not send the image to a server. Other parts of the site, such as analytics or ads, are separate from the resizing code.

Tips

Fix the pixel size first, then adjust KB. Smaller dimensions are the most effective way to cut file size.
For photos, JPG or WebP at 80–85 quality is a reasonable starting point.
Check the final size under the preview against the limit on your form before you upload it there.
Use Crop to Fill instead of Stretch when a face or logo should not look squeezed.

Frequently asked questions

Is my image uploaded when I resize it?

No. This tool processes the image in your browser and does not upload it. The resized file is created on your device and saved when you click download.

How do I resize image size in pixels and KB for a form?

Enter the required width and height, turn off the aspect lock if the shape is fixed, then type the maximum size in "Target file size (KB)". Choose JPG or WebP and check the size shown under the preview.

Can I resize an image to 140 x 60 pixels?

Yes. Press the 140 x 60 preset, or turn off "Keep aspect ratio" and type 140 and 60. Pick Crop to Fill or Pad if you do not want the image stretched.

Why is my file size not exactly the KB I entered?

The tool tries a few quality levels and stops when it is within about 10 KB of your target, so the result can be a little above or below. If it is still too big, reduce the width and height.

Why does target KB not work with PNG?

PNG is lossless, so there is no quality setting to lower. Choose JPG or WebP if you need to control the file size.

Can I resize several images at once?

Not in this tool. You load one image at a time. For many images, try the Bulk Image Resizer.

What happens to a transparent PNG?

The canvas is filled with a white background first, so transparent areas turn white in the downloaded file.

What is the best way to reduce image dimensions in pixels without making it look bad?

Keep the aspect ratio on, avoid enlarging, and export as JPG or WebP with quality around 80–85. Check the preview before downloading.

Why use this tool?